Binder attachment for sewing machines



April 18, 15,4 1. J. E. ACKERMAN BINDER ATTACHMENTS FOR SEWING MACHINES Filed July 2. 1943 awutwvm chines (fio cieerman Wm: 92" '57 I Patented Apr. 18, 1944 BINDER ATTACHMENT FOR SEWING MACHINES James E. Ackerman, Devon, Conn., assignor to The Singer Manufacturing Company, Elizabeth, N. J., a corporation ofNewJersey Application July 2, 1943, Serial No. 493,223

6 Claims.

This invention relates to binders for use with sewing machines and more particularly to binders of the strip-inverting type.

The invention has for its object to provide a strip-inverting and edge-inturning binder facilitating the handling of binding-strips of substantial thickness, such as binding-strips of leather and leather imitations.

The invention consists in the binding-strip guiding and folding devices hereinafter described in connection with the accompanyin drawing, which illustrates a preferred embodiment of the invention and in which:

Fig. 1 is a perspective view of the improved binder loaded with a binding-strip. Fig. 2 is a top plan view of the binder. Fig. 3 is a front side elevation of the binder. Fig. 4 is a rear side elevation of the binder. Fig. 5 is an end elevation of the strip-receiving end of the binder.

As Shown in the drawing, the improved binder has an L-shaped supporting plate I provided with a slot 2 elongated lengthwise of the binder. The supporting plate I has an upturned member 3 to which the inner or core-member 4 of the binder is secured by a screw 5.

The core-member 4 comprises a block formed to provide an outer guide-wall of substantially horizontal U-shape. The upper horizontal face 6 of the core-member guide-wall is disposed slightly below the upper edge of and extends to the supporting-plate member 3, at the strip receiving end of the binder, whereby the upper portion of the member 3 may serve as an edge-guide for the upper ply of a double binding strip B.

As illustrated more particularly in Fig. 3 of the drawing, the lower core-member face 1', which. is disposed substantially parallel to the upper face 6, terminates in a shoulder 8 formed by a rib 9 depending from the core-member 4 adjacent the supporting-plate member 3. The rib 9 preferably extends throughout the length of the coremember and the shoulder 8 of the rib 9 provides an edge-guide for the lower ply of the doubled binding-strip B. It will, therefore, be understood that at the entrance portion of the binder, the upper ply of the binding-strip is wider than the lower ply thereof.

Spaced from the core-member 4 to form therewith a, horizontal U-shaped channel for the binding-strip B is a correspondingly shaped outer or shell-member ID. The lower limb I I of the shellmember I0 is disposed in binding-strip confining relation with the rib 9 of the core-member; said lower limb H extending under said rib 9 and being suitably attached to the underside of the supporting plate I. The upper limb of the shell-member i0 is partly cut away to form, at the strip-receiving end of the binder, an earl2 bent down over the upper edge of the supportingplate member 3 into face contact with said member at the side thereof opposite the core side.

The shell-member H! is preferably provided along the bend thereof with the usual slot I3 to facilitate insertion of a binding-strip into the binder.

Rising from the upper face 6 of the core-member in spaced relation to the bend of said coremember is a rib l4 extending longitudinally of the core-member adjacent the supporting-plate member 3. The rib [4 has the beginning end portion of its upper face beveled to form a stripmargin deflector l5 inclined outwardly from the core-member face 6 in the direction of movement of a binding-strip through the binder; said stripmargin deflector portion of the rib preferably terminating substantially medianly 0f the length of the rib. The deflector-portion l5 of the rib preferably begins at a point spaced from the strip-receiving end of the binder, and said stripdeflector portion l5 preferably has the side face thereof opposite to the supporting-plate member 3 inclined lengthwise away from said member 3 in the direction of movement of the strip through the binder. The strip-deflector portion l5 of the rib therefore has transversely inclined faces, whereby said portion I5 of the rib progressively increases in size both widthwise and depthwise. The rib 14 preferably extends to the delivery end of the binder, at which end the core-member 4 is cut away and recessed to form the conventionally inclined and spaced strip-inverting edges l6, I1, and to provide a body material edge-guide l 8 between said edges.

Beyond the ear l2, the upper limb of the shellmember ID is cut away to form a shell-edge H! which is preferably slightly inclined lengthwise of the binder in a direction away from the rib 14; said edge l9 being disposed in close proximity to the rib I4 at the point of beginning of said edge 19 adjacent the ear [2. Approximately medianly of the length of the binder, the shell edge I9 merges into a fold-defining shell-edge 20 spaced slightly from and disposed substantially parallel to the rib l4; said shell-edge 19 being disposed below the level of the upper face of the rib I4 beyond the beveled strip-deflecting face 15 of the rib. The shell-member Ill terminates substantially at the edge-guide l8 of the core-member 4, and it will therefore be understood that the inclined strip-inverting edges l6, I! of the coremember extend beyond the shell-member Hi.

stantially at the delivery end of the shell-member l0, whereby the rib M extends beyond the plate 22.

The core-member 4 is recessed at the rearward side thereof beyond the supporting-plate wall 3, thereby forming a shoulder 24 extending lengthwise of the binder. Secured by a screw 25 upon the recessed portion of the core-member and held by the shoulder 24 against turning about the screw 25, is a plate 26 which is notched to provide spaced arms 2! and 28 defining a U-shaped edge 29 disposed in coincidence with the delivery mouth of the core-member 4 atthe rearward side of said mouth. The arms 21 and 28 are bent forwardly at right angles about the rearward ends of the strip-inverting edges l6 and ll of the core- .member, to form strip-guiding fingers or hooks 30 and 3|. The lower strip-guiding hook 3| is preferably slightly wider than its arm 28 so as to project slightly above the lower strip-inverting edge l7, thereby better to guide the binding-strip B. As illustrated more particularly in Figs. 1 and 2 of the drawing, the rib I4 is cutaway at the delivery end of the binder to form an inclined strip-guiding edge 32 which coincides with the upper strip-inverting edge l6, In introducing the binding-strip B into the binder, the binding-strip is longitudinally doubled so that the upper ply isslightly wider than the lower ply thereof; the edge of the upper ply being'guided by the supporting-plate member 3 and the edge of the lower ply being guided by the shoulder 8.0f the core-member rib 9. As the binding-strip is passed through the binder, the margin of the upper ply of the strip is deflected upwardly away from the plane of the core-member face 6 by the upwardly inclined face l of the rib l4. This'upwardly deflected'margin of the binding-strip is folded back by the inclined edge 23 of the plate 22 and is then forced downwardly upon the-upper face of the shell-member ID by the under face of said plate 22; the bindingstrip being bent about the fold-defining shelledge 20.

The binding-strip is then inverted about the core-member edges I6 and I! in the conventional manner, thereby inturning the folded margin of the strip; the inclined edge 32 of the rib I 4, together with the guide-hooks 30 and 3| suit-- ably confining and guiding the strip.

Having thus set forth the nature of the invention, what I claim herein is:

1. A strip-reversing binder for sewing machines, comprising; a core-member widthwise formed to provide a U-shaped outer guide-wall and lengthwise terminating in an inclined foldinverting edge, a rib rising from a face of said wall in spaced relation to the bend of the wall and etxending longitudinally of said core-memher, said rib having a strip-margin deflecting portion lengthwise inclined outwardly from said face toward said fold-inverting edge, an outer shell-'- member formed and disposed with respect to said core-member to provide therebetween a U-shaped strip-folding channel, said shell-member having a fold-defining side edge thereof disposed adja-v cent said rib at the wall-bend side, of the rib,

and a strip-margin folding plate carried by said rib and overhanging said fold-defining edge of the shell-member.

2. A strip-reversing binder for sewing machines, comprising, a core-member widthwise having a U-shaped outer guide-wall and lengthwise terminating in an inclined fold-inverting edge, a rib rising from a face of said wall in spaced relation to the bend of the wall and extending longitudinally of said core-member, said rib having a portion of its length beveled to provide a strip-margin deflector beginning at a point in said face spaced from the strip-receiving end of said core-member and inclined outwardly from said face toward said fold-inverting edge, a U- shaped outer shell-member spaced from said core-member to form therewith a, U-shaped stripfolding channel, said shell-member having a folddefining side edge thereof disposed adjacent said rib at the wall-bend side of the rib, and a stripmargin folding plate complemental to said fold-- defining edge of the shell-member in folding the margin of a binding strip upon the outer face of said shell-member.

3. A strip-reversing binder for sewing machines, comprising, a core-member widthwise formed to provide a U-shaped outer guide-wall and lengthwise terminating in an inclined foldinverting edge, a rib rising from an edge portion of a side face of said wall and extending longitudinally of said core-member in spaced relation to the bend of the core-member, said rib b ginning adjacent the strip-receiving end of the binder in a transversely inclined strip-margin defiecting p rtion of increasing width and depth, a U-shaped' outer shell-member disposed with respect to said core-member to form therewith a U-shaped strip-folding channel, said shell-member having a fold-defining sideedge portion disposed adjacent said rib at the wall-bend side of the rib, and said fold-defining side edge having a portion of the length thereof adjacent said strip-margin deflecting portion of said rib inclined increasingly away from the longitudinal axis of the rib, and a strip-marginfolding plate overhanging said fold-defining side edge of the shell-member between said strip-margin deflecting portion of the rib and said fold-inverting edge of the core-member.

4. A strip-reversing binder for sewing machines, comprising, a core-member widthwise formed to provide a U-shaped outer guide-wall having substantially parallel outer side faces and lengthwise terminating in a fold-inverting edge inclined to the length of the core-member, a rib rising from one of said side faces of the coremember and having a strip-margin deflecting portion inclined outwardly from the plane of said face in a direction toward the delivery end of the binder, a U-shaped outer shell-member disposed with respect to said core-member to form therewith a U-shaped strip-folding channel, said shellmember having a fold-defining side edge disposed adjacent said rib, and a strip-margin folding plate overhanging said fold-defining edge of the shell-member between said strip-margin deflectmg portion of the rib and said fold-inverting edge of the core-member, said plate having a free edge thereof inclined increasingly to overhang said shell-member toward the delivery end of the binder.

d. A strip-reversing binder for sewing machines, comprising, a core-member having a U-shaped outer guide-wall and provided at one end with spaced strip-inverting edges inclined to the longitudinal axis of the core-member, said core-member having substantially parallel faces each terminating in a rib extending longitudinally and spaced from the bend of the core-member, one of said ribs forming a binding-strip edgeguide, and the other of said ribs having the beginning end thereof in the region of the stripreceiving end of the binder inclined outwardly from its core-member face to form a strip-margin deflector, a U -shaped shell-member disposed with respect to said core-member to form therewith a U-shaped strip-folding channel, said shell-member having one limb disposed in strip-confining relation with the edge-guide rib and having the other limb terminating in a fold-defining side edge disposed adjacent and in spaced relation to the strip-margin deflector rib, and a strip-margin folding plate overhanging the fold-defining edge portion of the shell-member between said stripmargin deflector and said strip-inverting edges.

6. A strip-reversing binder for sewing machines, comprising, a core-member having a U-shaped outer guide-wall and having a notched strip-delivery mouth providing spaced strip-inverting edges inclined to the longitudinal axis of the core-member, said core-member having substantially parallel side faces each provided at the side edge thereof remote from the bend of said guide-Wall with a rib extending longitudinally of the core-member, one of said ribs forming a binding-strip edge-guide and the other of said ribs having the beginning end thereof in the region of the strip-receiving end of the binder inclined outwardly from its core-member face to form a strip-margin deflector, a U-shaped shell-member disposed with respect to said core-member to form therewith a U-shaped strip doubling channel, said shell-member having one limb disposed in strip-confining relation with the edge-guiding rib of the core-member and having its other limb terminating in a fold-defining side edge disposed adjacent and in spaced relation to the stripmargin deflector rib, a binding strip edge-guide disposed at the side of said strip-margin deflector rib remote from the bend of the core-member guide-wall, a strip-margin folding plate carried by the strip-margin deflector rib and overhanging the fold-defining edge portion of the shellmember, and a plate secured upon the back face of the core-member and having spaced arms defining a U-shaped edge disposed in coincidence with the notched delivery mouth of the coremember, said arms being bent forwardly about the rearward ends of the strip-inverting edges of the core-member and forming binding-strip confining guide-hooks.

JAMES E. ACKERMAN. 

